摘要
采用超声波加工工程陶瓷等硬脆材料时,工件材料表面受到磨粒的碰撞,接触区域将发生变形。利用断裂力学和接触力学的方法分析撞击区域的应力及应力波传播,并使用ANSYS/LSDYNA有限元软件数值模拟分析工件材料表面的裂纹产生过程及扩展。
When hard and brittle materials such as engineering ceramics are processed by ultrasonic machining,the surface of the workpiece is impacted by the abrasive material,the contact area will be deformed. According to the theory of contact mechanics and fracture mechanics,the stress and wave are analyzed in the deformed area. Besides,the generation process and extension of the workpiece crack are analyzed numerically and simulatedly by ANSYS/LS-DYNA finite element software.
引文
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